Tire-pressure-gauge connection



Patented Sept. 5, 1922.

UNITED STATES rarsNr orties.

oswALD H. HANSEN, or roar., N. Y.

TIRE-PRESSURE-GAUG-E CONNECTION.

To all whom may concern-f Be it known that I, OswALD H. HANSEN,

Connection, of which the .following is a full, f

clear, and eXact description.

This invention relates to improvements iny tire pressure gauges, anobjectofthe in` vention being to provide a combination gauge and safetyair chuck foriattachm'ent to tire valves, so that a pneumatic tirefmay-Abe inflated to any predetermined pressure.'k

A further object is to provide apressure gauge and chuck'equ'ipment witha safety device, rwhich will blow off at any prede` terminedpressure,\warning the operatorthat pressure hasbeen reached in thethedesired tire.- p

Another object yis to apparatus. f

With these and 'other objects in view,j they invention consists incertain novel features of construction and combinations and yar'rangements of parts as will be more'fully, and pointed out in: the.

hereinafter described claims. In the accompanying drawings Figure 1 is aview lin vertical section through my improved pressure gauge;

Figure 2 is a reduced view in side elevation thereof;

Figure 3 is a fragmentary top plan view` f casingf The sleeve isformedat its lower yend' iwith an internal' annular lip or thereof Figure 4 isa sectional plan view lon'ithe@ line 4--4 of Figure 1; v i

Figure 5 is an enlarged fragmentary view in vertical section; v v

Figure 6 is a view in transverse section onr the line 6 6 of Figure 1,;

Figure 7 is a view in side elevationof;

' -fthe ordinary inner tube. -In order to.,l opthe cam 39 Figure 8 isfatop plan view ofv Figure 7;`

and

Figure 9 is a fragmentary view `inside elevationof the lower end' of thecasing. y

Referring. in detail to the drawings, 1,; l

is adaptedtoengagethe valve stem vand hold represents a cylindricalhollow casing havlprovide ja. pressureV gauge of the character stated.which is 'eX-` ceedingly simple and practical in construe-f tion,embodying certain novel 'features which tend to materially lessen thecost of'manu-I facture, and which inno way detract fromv the strength,durability and ,efliciency of thev Application filed March 26,4 1921.SerialNo.y 455,733.

ing'an air inlet port 2 Vinoneside and anl air outlety port 3 at a pointdiametrically opposite the inlet port and spaced above the An annularinternal shoulder 4 in the casing between the ports 2 Aand 3, isbevelled, as'indicated at 5, toprovide a seat kfor a cup-shaped valvesuchy as 6, slidable verticallyin the enlarged upper end of the bore ofthe casing and formed adjacent its lower endl with an annular groove 6"communicatlingwith' the outlet port 3.

elongated nipple 7 has one end fric- `tionallyfitted into theinlet port2, and at :its outer-end is rexternally screw threaded,

`as indicated 1at'8, to :facilitate the attachs. .ment ofa nozzle of anair hose (not shown) thereto.r

A conventionalform of air check valve-designated in its entirety by theref- ;erencenumeral, is `mounted in the nipple 7 for a purpose whichwill hereinafter appear. `A dusty ca'p 10 may be screwed on to ltheouterendof the'nipple 7 when the `gauge is1not in use. f A hollow plug11 frictionally fitted into theyfoutlet port is provided with anopeningfor vent 12. Asplit sleeve 13 is locatedy around the plug 11between the casing'l and a flange 14 on the outer endof the plug and isprovided withan opening 15 adapted to be moved into registration withthe openingf-12 upon turning of the sleeve. The sleeve 13 may be' turnedto close the opening'12 and serve as a'dustguard whenthe device 'isf notin use.I

-Adjacent 'its lower end, the casing` 1 is externally reduced,'-asindicated at 16, and

a relatively wide groove 17 isL provided around the reducedy lower endof the casing.

i 1-8-represents a sleeve fitting/over and eX- tending below the'reducedlowerend of the A rubber collaru20 is supported on the 'flange-19 andwhenh the sleeve is in its normal' position abuts against the lower endof ther-casing r1. This. collar is adapted `to embrace the nipplewhich-is provided on ;vide a cross bar 21 ydriven into the lower tend ofthe casing 1 and carrying adownwardly,presentedjntegral pin 7.22. 'Thispin the valve open while air is pumped into a tube.

It will be apparent that by raising the sleeve 18 relative to the casing1, the `collar 2O will be compressed and bulge inwardly to iirmly grip anipple or other projecting air inlet. In order to accomplish thismovement of the sleeve, the upper end ofy the sleeve is cut away at oneside and the sleeve is recessed to provide at its upper end a pair orhooked arms 22, strad'dling the ca-sing.

A lever 23 includes a iat handle anda pair ot integral tapered webs 23at each side. These webs terminate in arms 24, straddling the casing 1and located in the groove 17. rThe arms 24 include angular shoulders 25adapted to fulcrum on the shoulder 26*j which forms the lower `wall ofthe annular groove 17. The arms are also formed with outwardly pressed'studs 27 located under the hooked arms 22 and engageable with thesearms to raise the sleeve 18 and bulge the collar 2O when the lever isdepressed. The casing 1 is formed with diametrically opposed curvedrecesses 28 communicating with the upperend ofthe groove 17 to provideclearance for the arms 24I and the sleeve 18 is out away, as indicatedat 29 to accommodate the webs-23 when the lever is depressed.

30 represents a cap tting over the upper end of the casing. This cap isslitte'd, as indicated at 31 to provide an arcuate tongue 32. Aninstruck lug 33 on the tonguev 32 'rides in an annular groove 34 aroundthe outer tace of the upper end of the casing and prev-ents accidentalvertical movement of the cap.

\ A central opening in the upper end of the cap 30 accommodates thereduced upper end of a valve stem 357 bearing at its lower end againstthe valve 6. A coiled expansion spring 36 located around the stem 35be-- tween a disc 37 :Fixed to the stem adjacent its lower end and acollar 38 slidable freely on the upper end ot the stem tends to 'holdthe valve on its seat when the collar 38 is depressed, as will bereadily understood.

An annular cam member 39 fits into the upper end of the casing vand'over the collar 38. An outstruck lug 40 on the cam member 39 rides in avertical slot or groove 41 in the casing and prevents rotary movement'of the cam member. n

The cam member 39 at its upper edge' is formed with 'an inwardlypresented cam iiange 42 having a series of pockets in its upper faceselectively engaged by a stud v43 projecting downwardly from the cap. Itwill be 'seen that by rotating the cap 30 to seat the stud 43 indifferent pockets, the cam will be depressed, actuatii'ig the collar 38and increasing the tension 'on the spring-36.

The lower edge of the cap 30 isl graduated, as indicated at 44, andthese graduations register with an indicating mark such as 45 on theouter race ot the casing. By turning the cap 3() until the desiredgraduation registers with the mark 45, the correct tension will beapplied to the spring 36, so that the valve 6 will blow oit when thepressure in the tire has reached the desired height.

The stud 43 is preferably in the form ot a screw engageable in athreaded post 46 in the cap. rlhis screw is adjustedto test the accuracyof the graduaticns on the cap and the post is then permanently crimpedaround the sameto prevent its accidental turning.

The operation of the device may be briefly described as follows In orderto inilate a pneumatic tire, the collar 2O is slipped over the nipple ofthe inner tube andthe lever 23 is moved to bulge the collar and tightlyclamp the nipple. The

sleeve 13 is turned to open the vent 12. The dust cap 10 is removed andthe nozzle of an air hose is attached to the nipple 7. The cap 30' isturned until the valve 6 is set to blow ott' at the desired pressure andair is pumped into the tube.: When the tire is inflated to the vdesiredpressure7 lthe valve 6 will be lifted permitting an escape or' airthrough the outlet port. The air hose is then detached from the. nipple7, the check valve 9 serving to prevent an escape of air throughthecasing while the valve in the tire is held open by the pin 22.

Various forms ofinlet pipes or nipples mightk be substituted yfor thenipplev 7, depending upon the type of air hose to be attached, andnumerous other slight changes and alterations might be i'nade in thegeneral form and arrangement of the parts described without departingfrom my invention, and hence I do not vwish to limit myself to theprecise details set iorth, but shall 'consider myself at liberty to makesuch slight 'changes and alterations as fairly fall within the spiritand scope of the appended claims.

1.'In a coupling oiC the class described, a casing,-a sleeve 'sli'dableon the lower end 'of the casing and including an internal flange at itslower end, a resilient collar interpcscd between said flange and the endoi' saidr casing, a cam lever pivotally connected to the sleeve andtulcruniing on the 'casing to slide said sleeve and positively effectinternal bulging of said collar, said casing having an annular groovetherein, said lever including varms straddling thef casing andfulc'rmning on the bottom wall "or said groove, an'd said arms beingpivotally .connected to said sleeve.

2. In a Icoupling of the class described, a casing, a sleeve slidable`on the lower end 'ot the casing and "including an internal Vflange atits lower end, a resilient collar interposed between saidviiange Aandthe end or said lcasing,"a camlever pivotally'connected to the sleeveand fulcrumingon the casing to slide said sleeve and positively eiectinternal bulging osaid collar, said casing hav ing an annular' groovetherein, said lever including arms straddling the casing` andfnlcruniing on the bottom wall of said groove, and outstruck luge onsaid arme, said sleeve being,` cut away to provide hook-shaped armesupported on said luge.

3. In a device of the character described, a casing having a relativelywide external annular groove adjacent its 1iowe'r end7 a sleeve fittingover the lower end of the casing, an inwardly presented annular liparound the lower end of the sleeve, a rubber collar supported on the lipand abutting against the lower end of the casing, said sleeve being cutaway to provide at its upper the casing, shoulders on the arms fulcrum-king yon the lower wall of' the groove, studs on the arms located underthe hooked arme, whereby operation of the lever raises the sleeve tocompress the rubber collar.

4. A device of the characterfdescribed in claim 3 and including a crossbar frictionally fitting within the lower end of the casing, a dependingpin integral with the cross bar and adapted to engage the Stern of acheck valve when the collar is moved to enrbrace the nipple of such avalve.

OSl/VALD H. HANSEN.

